Permissive license offer greater freedom to users of the code that already exists. The only benefit of copyleft is that it lets you demand future code that you did not write and that the authors do not want to Open Source. It is about restricting their freedom, not enhancing yours.
Permissive licenses provide all of the “4 freedoms” that the Free Software Foundation talks about. You cannot really talk about the differences between cooyleft and permissive as a “freedom” because they are not.
The name “permissive” kind of gives it away that permissive licenses offer more freedoms about what you can do with the code you were given.